摘要
对2003年8月16日巴林左旗-阿鲁科尔沁旗间5 9级地震前震源区附近地震活动图像和地震学参数研究结果表明,震前5～1年震源区附近地震活动异常平静,而外围(150km≤△≤300km)区地震活动显著增强;震前2年左右,震源区附近地震学参数异常比较明显,异常项数比40%;震前1 0～0 5年地震学参数异常明显减弱,异常项数比仅10%。可见,地震学短期异常不明显。
The seismicity image and seismology parameter before M_S5.9 earthquake on Aug.16, 2003 between Balinzuoqi and Alukeerqinqi are studied. The results show there were seismicity quiescence of the epicenter area, and seismicity animation of the epicenter periphery (△=150～300Km) in 5～1 years before the main shock. The ratio precursory anomaly is 40% for seismology parameter of the epicenter area in 2 years before the main shock. The ratio precursory anomaly is 10% in 1.0～0.5 years before the main shock. Therefore, the short-term seismology anomaly are reduced.
出处
《东北地震研究》
2004年第4期1-7,共7页
Seismological Research of Northeast China
